format
This data frame has 3110 rows and eight columns describing the habitat
composition
for each occurrence of three species of Galliformes. For each
located occurrence (in rows), the employees of the national park have noted:
the species, the elevation (in metres), the aspect (8 classes), the
habitat type (7 categories, FR means "fallen rocks") and the
date (season, day, month and year).source
Calenge, C., Martinot, J.P. and Lebreton, P. (2003)
Ecological niche separation among mountain Galliformes in the Vanoise
National Parc. Game and Wildlife Science, 20, 259-285.